Locking device, more particularly for textile machines



Feb. 9, 1932. w, SCHWElTER 1,844,300

LOCKING DEVICE, MORE PARTICULARLY FOR TEXTILE MACHINES Filed Dec. 4, 1950 0 Ma; aw);

Patented Feb. 9, 1932 career OFFEQE WALTER SCHWEITEB, OF EORGEN, NEAR ZURICH, SWITZERLAND LOCKING DEVICE, MORE PARTICULARLY FOR TEXTILE MACHTNES Application filed December 4, 1930, Serial No. 500,125, and in Germany January '18, 1930.

The invention relates to locking devices more particularly intended for textile machines.

In these machines, especially in winding machines, locking devices, are employed the object of which is to cause the yarn guide or the yarn guide carrier to easily give way in one direction in accordance with the increase of the yarn layers wound on the bobbin, and to be locked in the opposite direction of motion. In looking devices of this class generally locking members are made use of such as balls, rollers, wedges or the like which cooperate with a guide member, for instance a bar, in such a manner that they are loosely entrained in the one direction but upon motion in the opposite direction are clamped between the guide bar and an internally tapering sleeve surrounding the device whereby a motion of the yarn guide in this direction is prevented.

Now it has been found that by these looking members which in order to work satisfactorily are made from hardened steel, the guide bar is worn out in the course of time, by longitudinal grooves being engraved therein which not only impair the appearance of the machine but under circumstances grow so deep as to harm the correct working of the locking device. The invention has therefore for its object to overcome these drawbacks.

This object is achieved primarily by the fact that a member is interposed between the locking members, such as balls, rollers, wedges or the like, and the guide member along which the member to be locked is moving, which interposed member takes up the pressure exerted by the locking members and distributes it on a large surface of the guide member. Advantageously an elastic ring is employed for this purpose which is shiftably arranged on the guide bar of the device and is held in position in a recess of the cage in which the locking members rest, the latter exerting their pressure upon the outer surface of this ring. In this Way thelocking'pressure is not transmitted immediately to a few individual places "of the guide bar, but to the entire circumference thereof and in the width of the interposedmember,'so that vany deformation of the guide bar is excluded. Furthermore, the resilient ring favors the release of'the locking device because it tends to move the locking members radially outwardly, that means to lift them from the guide bar.

In order that the invention may be more readily understood," a preferred embodiment of the locking device according to the invention is illustrated by way of example in the accompanying drawing which shows on an enlarged scale a vertical section through the locking device of-a type intended to housed in bobbin'winding'frames The device'comprises aninternally tapering cap 1 screwed ontot a sleeve 3 which is shiftable on the guide-bar 2, and another sleeve 5v likewise shiftable on bar 2 and forming the cage for the locking balls la-which are 7 distributed onthe entire circumference of bar 2. Between sleeve 3 and sleeve 5 is provided acoiled spring 6 while'a ring 7 is mounted on the outer surface of sleeve 5 which ring servesas aahandle for easily disassemblingthe device. Sleeve .3- isrigid with the front plate 12 guided by a bar 11 and having mounted on it the cone l3'that cooperates with the bobbin to be wound.

N ow the balls 4 distributed on the circunn ference of sleeve 5 a re not in immediate con- 1, acting as a clamping member, their pressure is not transmitted immediately to the bar 2, but to the elastic ring 8 by which the pressure is uniformly distributed on the entire surface of bar 2 covered by it, so that any deformation of bar 2 is excluded. Upon disengaging the locking device by shifting sleeve 5 toward the right, the elasticity of ring 8 enters into action and tends to lift the balls 4 radially and thus to release bar 2.

In lieu of the balls 4 of course cylindrical or conical rollers, wedges or the like may be made use of which act like the balls and hitherto have cooperated immediately with the guide bar 2. In such a design too the pressure exerted by these locking rollers etc. can be distributed on a larger surface by an interposed elastic' ring or a similar member, whereby the guide bar is prevented from wear.

What is claimed is:-

1. A locking device of the class described comprising a guide member, two sleeves shiftably mounted thereon, a clamp member fixed to one of said two sleeves, a spring interposed-between said sleeves, locking members arranged between said guide member and said clamp member and adapted to positively connect these parts in one direction of motion along said guide member, and a member interposed between said locking members and 'uide member adapted to distribute un form y'the pressure exerted by the former to the complete peripheral surface of the latter. 2. A locking device of the class described comprising a guide member, two sleeves shiftably mounted thereon, a clampmember fixed to one of said two sleeves, a spring interposed between said sleeves, locking members arranged between said guide member and said clamp member and adapted to positively connect these parts in one direction of motion along said guide member, and a re silient ring interposed between said locking members and said guide member and mounted thereon.

3. A locking device of the class described comprising a guide member, two sleeves shiftably mounted thereon, a clamp member fixed to one of said two sleeves, a spring interposed between said sleeves, locking members arranged between said guide member and said clamp member and adapted to positively connect these parts in one direction of motion along said guide member, a resilient ring interposed between said locking members and said guide member and mounted thereon, a recess in the other of said sleeves, said ring being held in place on said guide member within said recess.

4;. A locking device of the class described comprising a guide bar, two sleeves shiftably mounted thereon, a tapered cap fixed to one of said sleeves, a spring interposed between said sleeves, a plurality of circumferentially ber, 1930.

WALTER SCHWEITER. 

